399619070 has 32 divisors (see below), whose sum is σ = 728339040. Its totient is φ = 157852800.

The previous prime is 399619069. The next prime is 399619079. The reversal of 399619070 is 70916993.

It is a happy number.

It is a super-2 number, since 2×399619070² = 319390802215329800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399619079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 569720 + ... + 570420.

It is an arithmetic number, because the mean of its divisors is an integer number (22760595).

Almost surely, 2^399619070 is an apocalyptic number.

399619070 is a deficient number, since it is larger than the sum of its proper divisors (328719970).

399619070 is a wasteful number, since it uses less digits than its factorization.

399619070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 399619070 is about 19990.4744816125. The cubic root of 399619070 is about 736.5723324216.

The spelling of 399619070 in words is "three hundred ninety-nine million, six hundred nineteen thousand, seventy".